2, on-site construction personnel, machinery must obey the deployment of command and command.

3, to be fixed firmly when lifting to prevent decoupling. During the hoisting process, the workers shall not work under the lifting objects. Lifting process, the crane action to be stable, subject to ground commanding command.

4, bad weather conditions prohibit lifting, elevation operation must be configured with safety rope, climbing hand should be held, if the cement warehouse is higher than other buildings around the installation of lightning rods.